зеркало из https://github.com/mozilla/gecko-dev.git
80 строки
2.1 KiB
C++
80 строки
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ScopedLogExtraInfo.h"
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namespace mozilla::dom::quota {
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#ifdef QM_SCOPED_LOG_EXTRA_INFO_ENABLED
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MOZ_THREAD_LOCAL(const nsACString*) ScopedLogExtraInfo::sQueryValue;
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MOZ_THREAD_LOCAL(const nsACString*) ScopedLogExtraInfo::sContextValue;
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/* static */
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auto ScopedLogExtraInfo::FindSlot(const char* aTag) {
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// XXX For now, don't use a real map but just allow the known tag values.
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if (aTag == kTagQuery) {
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return &sQueryValue;
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}
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if (aTag == kTagContext) {
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return &sContextValue;
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}
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MOZ_CRASH("Unknown tag!");
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}
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ScopedLogExtraInfo::~ScopedLogExtraInfo() {
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if (mTag) {
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MOZ_ASSERT(&mCurrentValue == FindSlot(mTag)->get(),
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"Bad scoping of ScopedLogExtraInfo, must not be interleaved!");
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FindSlot(mTag)->set(mPreviousValue);
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}
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}
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ScopedLogExtraInfo::ScopedLogExtraInfo(ScopedLogExtraInfo&& aOther) noexcept
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: mTag(aOther.mTag),
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mPreviousValue(aOther.mPreviousValue),
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mCurrentValue(std::move(aOther.mCurrentValue)) {
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aOther.mTag = nullptr;
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FindSlot(mTag)->set(&mCurrentValue);
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}
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/* static */ ScopedLogExtraInfo::ScopedLogExtraInfoMap
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ScopedLogExtraInfo::GetExtraInfoMap() {
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// This could be done in a cheaper way, but this is never called on a hot
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// path, so we anticipate using a real map inside here to make use simpler for
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// the caller(s).
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ScopedLogExtraInfoMap map;
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if (sQueryValue.get()) {
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map.emplace(kTagQuery, sQueryValue.get());
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}
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if (sContextValue.get()) {
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map.emplace(kTagContext, sContextValue.get());
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}
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return map;
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}
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/* static */ void ScopedLogExtraInfo::Initialize() {
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MOZ_ALWAYS_TRUE(sQueryValue.init());
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MOZ_ALWAYS_TRUE(sContextValue.init());
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}
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void ScopedLogExtraInfo::AddInfo() {
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auto* slot = FindSlot(mTag);
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MOZ_ASSERT(slot);
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mPreviousValue = slot->get();
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slot->set(&mCurrentValue);
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}
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#endif
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} // namespace mozilla::dom::quota
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